An ultrasonic water meter module with cat.1 communication function

Abstract

The utility model provides a kind of ultrasonic water meter module with Cat.1 communication function, including MCU, power supply interface, Cat.1 circuit, ultrasonic signal processing circuit, card reading circuit, valve motor drive circuit, MCU is electrically connected with Cat.1 circuit, ultrasonic signal processing circuit, card reading circuit, valve motor drive circuit, and power supply interface is powered for MCU, Cat.1 circuit, ultrasonic signal processing circuit, card reading circuit, valve motor drive circuit. Ultrasonic signal acquisition mode is utilized, intelligent water meter has the advantages of high measurement accuracy, high stability, multiple measurement medium types, no pressure loss, replace manual field meter reading, field manual valve switching and other cumbersome operations by radio frequency card swiping technology, Cat.1 wireless communication technology, remote recharge, remote copy remote control operation is realized by cloud platform internet of things technology.

Description

Technical Field

[0001] This utility model relates to the field of smart meter technology, and in particular to an ultrasonic water meter module with Cat.1 communication function. Background Technology

[0002] The gradual popularization of wireless communication technologies (such as near-field radio frequency card technology and Cat.1 communication technology based on 4G networks) plays a key role in enriching the functions of smart water meters. Various kinds of smart electronic water meters have appeared on the market, such as card-type electronic water meters, Bluetooth electronic water meters, and NB electronic water meters. However, at present, these smart electronic water meters have limited functions and limited signal acquisition methods (the signal acquisition method relies on adding a circular magnet to the original mechanical gear, and using the circular motion of the magnet to sense magnetic sensitive elements, such as reed switches, magnetoresistive elements, and Hall elements, to sense a pulse signal proportional to the water flow). Summary of the Invention

[0003] This invention provides an ultrasonic water meter module with Cat.1 communication function, which solves the problems of limited functionality and single signal acquisition method in existing smart water meters.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an ultrasonic water meter module with Cat.1 communication function, including an MCU, a power supply interface, a Cat.1 circuit, an ultrasonic signal processing circuit, a card reading circuit, and a valve motor drive circuit. The MCU is electrically connected to the Cat.1 circuit, the ultrasonic signal processing circuit, the card reading circuit, and the valve motor drive circuit. The power supply interface supplies power to the MCU, the Cat.1 circuit, the ultrasonic signal processing circuit, the card reading circuit, and the valve motor drive circuit.

[0005] Preferably, the Cat.1 circuit includes a Cat.1 module U3, a patch data card U4, and a Cat.1 antenna Ant. Pins 12, 13, 14, and 15 of the Cat.1 module U3 are interfaces for the IoT card and are interconnected with pins 3, 6, 7, and 8 of the patch data card U4. Pins 9 and 10 of the Cat.1 module U3 are the main serial port transceiver terminals, which are connected to the corresponding serial port pins of the MCU. The MCU communicates and exchanges data with the Cat.1 module through this serial port. Pin 27 of the Cat.1 module U3 is connected to the antenna Ant. The data flow of the patch data card U4 is used to communicate with the host computer through the cloud platform to realize remote control.

[0006] Preferably, the card reader circuit includes resistors R4, R16, R17, R6, R23, R18, R13, transistor Q1, interface CON6, capacitors C11, C13, C18, C51, C52, and diode D1. One end of resistor R4 is connected to the base of transistor Q1, and the other end is connected to the MCU input of a low-frequency pulse train with a specific period. The collector of transistor Q1 is connected to one end of resistor R17, and the other end of R17 is connected to the power supply VCC. One end of R16 is connected to pin 2 of interface CON6, and the other end is connected between resistor R17 and the collector of transistor Q1. The emitter of transistor Q1 is grounded. Pin 1 of N6 is connected to the positive terminal of capacitor C11 and diode D1. The negative terminal of diode D1 is connected to the node formed by resistors R6 and R23. The other end of R23 is connected to the MCU. One end of capacitor C13 is connected to the node formed by R6 and R23, and the other end is connected to capacitor C18 and resistor R18. The other end of resistor R18 is connected to resistor R13 and capacitor C51. The other end of resistor R13 is connected to capacitor C52. The other end of capacitors C52, C51, C18, C11, and resistor R6 is grounded. The node VC- connected by resistor R13 and capacitor C52 is connected to the MCU. The node VC+ connected by resistor R18 and resistor R13 is connected to the MCU.

[0007] Preferably, the valve motor drive circuit includes a high-current DC motor drive chip U6, a capacitor C10, and an interface CON7. The high-current DC motor drive chip U6 and the capacitor C10 form a complete DC motor drive circuit. The MCU controls the forward / reverse rotation of the valve motor through the Motor_A and Motor_B terminals, driving the water meter base valve body to open / close the valve. CON7 is the interface for an external 5-wire valve, M+ and M- are DC motor interfaces, ON is the valve open signal, OFF is the valve closed signal, and GND is the common terminal.

[0008] Preferably, the ultrasonic signal processing circuit includes an interface CON2, an ultrasonic processing chip U2, crystal oscillators X2 and X3, capacitors C15, C16, C6, C7, C9, C14, and C17, and resistors R7 and R8. Pin 5 of the ultrasonic processing chip U2 is connected to resistor R2, and pin 6 is connected to resistor R3. Pins 4 and 1 of the interface CON2 are respectively connected to resistors R2 and R3, and capacitors C14 and C9. Capacitor C14 is connected to pin 30 of the ultrasonic processing chip U2, and capacitor C9 is connected to the ultrasonic processing... Pin 27 of chip U2, crystal oscillator X2, and capacitors C15 and C16 form the high-frequency clock circuit of ultrasonic processing chip U2, which is connected to pins 1 and 2 of U2. Crystal oscillator X1 and capacitors C6 and C7 form the low-frequency clock circuit of ultrasonic processing chip U2, which is connected to pins 15 and 16 of U2. Pins 14 and 29 of U2 are connected to power supply VCC. Resistors R7 and R8 and capacitor C17 are used as anti-interference components on unused pins. Pins 8, 9, 10, 11, 12, and 13 of ultrasonic processing chip U2 are connected to MCU.

[0009] Preferably, the power supply interface includes interface CON3, diode D2, filter capacitors C24 and C5, resistor R5, and capacitor C8. Pin 1 of interface CON3 is connected to the battery, the positive terminal of resistor R5 and diode D2. The other end of resistor R5 is connected to capacitor C8. The negative terminal of diode D2 is connected to filter capacitors C24 and C5. The other ends of interface CON3, filter capacitors C24, C5, and C8 are grounded. The node where capacitor C8 and resistor R5 are connected is connected to the MCU.

[0010] Preferably, it also includes a touch button circuit, which includes a main chip U5, TK1 is a spring-shaped touch sensing button input terminal connected to pin 3 of the main chip U5, pin 1 of the main chip U5 is a high and low level signal output terminal connected to the MCU, pin 5 is connected to capacitor C23 and grounded, and pin 2 is grounded.

[0011] Preferably, it also includes a liquid crystal display unit, which is electrically connected to the MCU.

[0012] Preferably, it also includes an illumination indicator circuit, in which resistor R12 and indicator LED1 form an illumination indicator circuit, which is connected to the MCU.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows: This invention utilizes ultrasonic metering, making the water meter more adaptable to various metering media, improving metering accuracy and stability. Compared to mechanical metering, ultrasonic metering reduces pressure loss in water pipelines and improves delivery efficiency. Furthermore, radio frequency card reading technology, Cat.1 wireless communication technology, cloud platform technology, and Internet of Things technology solve the practical problems of cumbersome on-site meter reading, improving the efficiency of water meter payment, viewing, valve operation, etc., saving manpower, and increasing timeliness. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the ultrasonic water meter module with Cat.1 communication function of this utility model. Figure 2 This is the circuit diagram of the MCU of this utility model; Figure 3 This is a circuit diagram of the Cat.1 circuit of this utility model; Figure 4 This is a circuit diagram of the card reader circuit of this utility model; Figure 5 This is a circuit diagram of the valve motor drive circuit of this utility model; Figure 6 This is a circuit diagram of the ultrasonic signal processing circuit of this utility model; Figure 7 The circuit diagram is for the power supply interface of this utility model; Figure 8 This is a circuit diagram of the touch button circuit of this utility model; Figure 9 This is a circuit diagram of the liquid crystal display unit of this utility model; Figure 10 This is a circuit diagram of the luminous indicator circuit of this utility model. Detailed Implementation

[0015] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below through embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0016] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0017] like Figure 1As shown, this embodiment provides an ultrasonic water meter module with Cat.1 communication function, including MCU, power supply interface, Cat.1 circuit, ultrasonic signal processing circuit, card reading circuit, and valve motor drive circuit. The MCU is electrically connected to the Cat.1 circuit, ultrasonic signal processing circuit, card reading circuit, and valve motor drive circuit. The power supply interface supplies power to the MCU, Cat.1 circuit, ultrasonic signal processing circuit, card reading circuit, and valve motor drive circuit.

[0018] As a preferred option, such as Figure 2 As shown, the MCU uses the HC32L136K8TA low-power chip from Huada Semiconductor, based on the ARM Cortex-M0 core, integrating a large-capacity embedded flash memory, with rich analog and digital peripherals, and excellent low-power characteristics. In the circuit, crystal oscillator X1, capacitor C3, and capacitor C4 are the main working clock CLK crystal oscillator circuit, interface CON1 is the SWD download simulation interface, and capacitor C2 and resistor R1 form the MCU power-on reset circuit.

[0019] As a preferred option, such as Figure 3 As shown, the Cat.1 circuit includes a Cat.1 module U3, a patch data card U4, and a Cat.1 antenna Ant. Pins 12, 13, 14, and 15 of the Cat.1 module U3 are interfaces for the IoT card and are interconnected with pins 3, 6, 7, and 8 of the patch data card U4. Pins 9 and 10 of the Cat.1 module U3 are the main serial port transceiver terminals, which are connected to the corresponding serial port pins of the MCU. The MCU communicates and exchanges data with the Cat.1 module through this serial port. Pin 27 of the Cat.1 module U3 is connected to the antenna Ant. The data flow of the patch data card U4 is used to communicate with the host computer through the cloud platform to achieve remote control.

[0020] As a preferred option, such as Figure 4As shown, the card reader circuit includes resistors R4, R16, R17, R6, R23, R18, R13, transistor Q1, interface CON6, capacitors C11, C13, C18, C51, C52, and diode D1. One end of resistor R4 is connected to the base of transistor Q1, and the other end is connected to the MCU input of a low-frequency pulse train with a specific period. The collector of transistor Q1 is connected to one end of resistor R17, and the other end of R17 is connected to the power supply VCC. One end of R16 is connected to pin 2 of interface CON6, and the other end is connected between resistor R17 and the collector of transistor Q1. The emitter of transistor Q1 is grounded. Interface CON6... Pin 1 of terminal 6 is connected to the positive terminal of capacitor C11 and diode D1. The negative terminal of diode D1 is connected to the node formed by resistors R6 and R23. The other end of R23 is connected to the MCU. One end of capacitor C13 is connected to the node formed by resistors R6 and R23, and the other end is connected to capacitor C18 and resistor R18. The other end of resistor R18 is connected to resistor R13 and capacitor C51. The other end of resistor R13 is connected to capacitor C52. The other end of capacitors C52, C51, C18, C11, and resistor R6 is grounded. The node VC- connected by resistor R13 and capacitor C52 is connected to the MCU. The node VC+ connected by resistor R18 and resistor R13 is connected to the MCU.

[0021] The card_125K input receives a low-frequency pulse train with a specific period. After being amplified by resistor R4, transistor Q1, resistor R16, and resistor R17, it is input to the external low-frequency card induction coil L via pins 2 of interface CON4. When the RFID card approaches the external induction coil (card swiping), the induction coil and capacitor C11 form an LC oscillation circuit, generating a certain oscillation signal. This signal is then processed by a detection, limiting, and shaping circuit composed of diode D1, resistors R6, R23, R18, and R13, and capacitors C13, C18, C51, and C52. Finally, it is input to the corresponding port of the MCU via the Cardcheck, VC+, and VC- pins for processing and reading the information of the RFID card (user card, management card, recharge card, setting card, etc.).

[0022] As a preferred option, such as Figure 5 As shown, the valve motor drive circuit includes a high-current DC motor driver chip U6, capacitor C10, and interface CON7. The high-current DC motor driver chip U6 and capacitor C10 form a complete DC motor drive circuit. The MCU controls the forward / reverse rotation of the valve motor through Motor_A and Motor_B terminals, driving the water meter base valve body to open / close the valve. CON7 is the interface for an external 5-wire valve; M+ and M- are DC motor interfaces; ON is the valve open signal, OFF is the valve closed signal, and GND is the common terminal. The valve control circuit can output control signals for opening and closing the valve. Through an external electric valve actuator, it controls the forward and reverse rotation of the valve motor to achieve automatic control of the water meter valve opening and closing.

[0023] As a preferred option, such as Figure 6 As shown, the ultrasonic signal processing circuit includes interface CON2, ultrasonic processing chip U2, crystal oscillators X2 and X3, capacitors C15, C16, C6, C7, C9, C14, and C17, and resistors R7 and R8. Pin 5 of ultrasonic processing chip U2 is connected to resistor R2, and pin 6 is connected to resistor R3. Pins 4 and 1 of interface CON2 are connected to resistors R2 and R3, and capacitors C14 and C9, respectively. Capacitor C14 is connected to pin 30 of ultrasonic processing chip U2, and capacitor C9 is connected to the ultrasonic processing chip... Pin 27 of U2, along with crystal oscillator X2 and capacitors C15 and C16, forms the high-frequency clock circuit for the ultrasonic processing chip U2, connected to pins 1 and 2 of U2. Crystal oscillator X1 and capacitors C6 and C7 form the low-frequency clock circuit for the ultrasonic processing chip U2, connected to pins 15 and 16 of U2. Pins 14 and 29 of U2 are connected to the power supply VCC. Resistors R7 and R8 and capacitor C17 are used as anti-interference components on unused pins. Pins 8, 9, 10, 11, 12, and 13 of the ultrasonic processing chip U2 are connected to the MCU. Pins 3 and 4 of CON2 are the high-level ultrasonic probe interface, and pins 1 and 2 are the low-level ultrasonic probe interface. The high-level and low-level ultrasonic signals are current-limited by resistors R2 and R3 before being input to pins 5 and 6 of the ultrasonic processing chip U2.

[0024] The ultrasonic signal processing circuit is a signal processing circuit for water meter data acquisition. It uses two external ultrasonic probes fixed to the water pipe to acquire and measure the user's water consumption. It processes the ultrasonic signals output by the ultrasonic probes and outputs the processed measurement data to the MCU.

[0025] As a preferred option, such as Figure 7 As shown, the power supply interface includes interface CON3, diode D2, filter capacitors C24 and C5, resistor R5, and capacitor C8. Pin 1 of interface CON3 is connected to the battery, the positive terminal of resistor R5 and diode D2. The other end of resistor R5 is connected to capacitor C8, and the negative terminal of diode D2 is connected to filter capacitors C24 and C5. The other ends of interface CON3, filter capacitors C24, C5, and C8 are grounded. The node connecting capacitor C8 and resistor R5 is connected to the MCU. In this embodiment, the water meter module is powered by an external lithium battery. The positive terminal of the battery is connected to pin 1 of CON3, and the operating power is output through diode D2. C24 and C5 are filter capacitors to ensure the stability of the power supply. R5 and C8 form a battery voltage sampling circuit for the MCU to detect the battery voltage.

[0026] As a preferred option, such as Figure 8As shown, it also includes a touch button circuit. The touch button circuit includes a main chip U5, and TK1 is a spring-shaped touch-sensitive button input terminal, connected to pin 3 of the main chip U5. Pin 1 of the main chip U5 is a high / low level signal output terminal, connected to the MCU. Pin 5 is connected to capacitor C23 and grounded, and pin 2 is grounded. TK1 is the spring-shaped touch-sensitive button input terminal. When a finger approaches or touches the button, the human touch sensing signal is input to U5 through this pin. The touch chip U5 processes the human touch signal and converts it into a stable high / low level signal, which is output through pin 1 of the touch chip U5 and connected to the corresponding port of the MCU for use as a physical button signal.

[0027] As a preferred option, such as Figure 9 As shown, it also includes a liquid crystal display unit, which is electrically connected to the MCU. The LCD1 screen shown is a custom low-power, dedicated display screen, connected to the corresponding pins of the MCU via 22 pins: COM0, COM1, COM2, COM3, S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S13, S14, S15, S16, and S17. It is used to display various parameters of the water meter, real-time operating status, real-time clock, settings, and running status.

[0028] As a preferred option, such as Figure 10 As shown, it also includes an illumination indicator circuit. Resistor R12 and indicator LED1 form an illumination indicator circuit, which is connected to the MCU and used to indicate the working status of the entire water meter module, such as communication status, connection status, payment and maintenance status, valve opening and closing status, etc.

[0029] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An ultrasonic water meter module with Cat.1 communication function, characterized in that: It includes an MCU, a power supply interface, a Cat.1 circuit, an ultrasonic signal processing circuit, a card reading circuit, and a valve motor drive circuit. The MCU is electrically connected to the Cat.1 circuit, the ultrasonic signal processing circuit, the card reading circuit, and the valve motor drive circuit. The power supply interface supplies power to the MCU, the Cat.1 circuit, the ultrasonic signal processing circuit, the card reading circuit, and the valve motor drive circuit.

2. The ultrasonic water meter module with Cat.1 communication function according to claim 1, characterized in that: The Cat.1 circuit includes a Cat.1 module U3, a patch data card U4, and a Cat.1 antenna Ant. Pins 12, 13, 14, and 15 of the Cat.1 module U3 are interfaces for the IoT card and are interconnected with pins 3, 6, 7, and 8 of the patch data card U4. Pins 9 and 10 of the Cat.1 module U3 are the main serial port transceiver terminals, which are connected to the corresponding serial port pins of the MCU. The MCU communicates and exchanges data with the Cat.1 module through this serial port. Pin 27 of the Cat.1 module U3 is connected to the antenna Ant. The data flow from the patch data card U4 is used to communicate with the host computer through the cloud platform to achieve remote control.

3. The ultrasonic water meter module with Cat.1 communication function according to claim 1, characterized in that: The card reader circuit includes resistors R4, R16, R17, R6, R23, R18, R13, transistor Q1, interface CON6, capacitors C11, C13, C18, C51, C52, and diode D1. One end of resistor R4 is connected to the base of transistor Q1, and the other end is connected to the MCU input of a low-frequency pulse train with a specific period. The collector of transistor Q1 is connected to one end of resistor R17, and the other end of R17 is connected to the power supply VCC. One end of R16 is connected to pin 2 of interface CON6, and the other end is connected between resistor R17 and the collector of transistor Q1. The emitter of transistor Q1 is grounded. Interface CON6... Pin 1 is connected to the positive terminal of capacitor C11 and diode D1. The negative terminal of diode D1 is connected to the node formed by resistors R6 and R23. The other end of R23 is connected to the MCU. One end of capacitor C13 is connected to the node formed by resistors R6 and R23, and the other end is connected to capacitor C18 and resistor R18. The other end of resistor R18 is connected to resistor R13 and capacitor C51. The other end of resistor R13 is connected to capacitor C52. The other end of capacitors C52, C51, C18, C11, and resistor R6 is grounded. The node VC- connected by resistor R13 and capacitor C52 is connected to the MCU. The node VC+ connected by resistor R18 and resistor R13 is connected to the MCU.

4. The ultrasonic water meter module with Cat.1 communication function according to claim 1, characterized in that: The valve motor drive circuit includes a high-current DC motor drive chip U6, a capacitor C10, and an interface CON7. The high-current DC motor drive chip U6 and the capacitor C10 form a complete DC motor drive circuit. The MCU controls the forward / reverse movement of the valve motor through the Motor_A and Motor_B terminals, driving the water meter base valve body to open / close the valve. CON7 is the interface for an external 5-wire valve, M+ and M- are DC motor interfaces, ON is the valve open signal, OFF is the valve closed signal, and GND is the common terminal.

5. The ultrasonic water meter module with Cat.1 communication function according to claim 1, characterized in that: The ultrasonic signal processing circuit includes interface CON2, ultrasonic processing chip U2, crystal oscillators X2 and X3, capacitors C15, C16, C6, C7, C9, C14, and C17, and resistors R7 and R8. Pin 5 of ultrasonic processing chip U2 is connected to resistor R2, and pin 6 is connected to resistor R3. Pins 4 and 1 of interface CON2 are connected to resistors R2 and R3, and capacitors C14 and C9, respectively. Capacitor C14 is connected to pin 30 of ultrasonic processing chip U2, and capacitor C9 is connected to the ultrasonic processing chip... Pin 27 of U2, crystal oscillator X2, and capacitors C15 and C16 form the high-frequency clock circuit of ultrasonic processing chip U2, which is connected to pins 1 and 2 of U2. Crystal oscillator X1 and capacitors C6 and C7 form the low-frequency clock circuit of ultrasonic processing chip U2, which is connected to pins 15 and 16 of U2. Pins 14 and 29 of U2 are connected to power supply VCC. Resistors R7 and R8 and capacitor C17 are used as anti-interference components on unused pins. Pins 8, 9, 10, 11, 12, and 13 of ultrasonic processing chip U2 are connected to MCU.

6. The ultrasonic water meter module with Cat.1 communication function according to any one of claims 1-5, characterized in that: The power supply interface includes interface CON3, diode D2, filter capacitors C24 and C5, resistor R5, and capacitor C8. Pin 1 of interface CON3 is connected to the battery, the positive terminal of resistor R5 and diode D2. The other end of resistor R5 is connected to capacitor C8. The negative terminal of diode D2 is connected to filter capacitors C24 and C5. The other ends of interface CON3, filter capacitors C24, C5, and C8 are grounded. The node where capacitor C8 and resistor R5 are connected is connected to the MCU.

7. The ultrasonic water meter module with Cat.1 communication function according to claim 1, characterized in that: It also includes a touch button circuit, which includes a main chip U5, TK1 is a spring-shaped touch sensing button input terminal, connected to pin 3 of the main chip U5, pin 1 of the main chip U5 is a high and low level signal output terminal, connected to the MCU, pin 5 is connected to capacitor C23 and grounded, and pin 2 is grounded.

8. The ultrasonic water meter module with Cat.1 communication function according to claim 1, characterized in that: It also includes a liquid crystal display unit, which is electrically connected to the MCU.

9. The ultrasonic water meter module with Cat.1 communication function according to claim 1, characterized in that: It also includes an illumination indicator circuit, which consists of resistor R12 and indicator LED1 and is connected to the MCU.

Images